System Design Interview: Machine Learning Platform and MLOps
6 min read As machine learning moves from research to production, companies need platforms that manage the full ML lifecycle: data ingestion, feature […] Read article
System Design
System Design
System Design Interview: API Gateway and Service Mesh
6 min read API gateways and service meshes are the networking backbone of modern microservices architectures. They handle cross-cutting concerns — authentication, rate Read article
Algorithms
Sliding Window and Two Pointer Interview Patterns
7 min read Sliding window and two pointer techniques are among the most frequently tested patterns in coding interviews. They convert O(n²) or Read article
System Design
System Design Interview: Kubernetes and Container Orchestration
5 min read Kubernetes is the de facto standard for container orchestration. Understanding its architecture, scheduling model, and operational patterns is increasingly expected Read article
System Design
System Design Interview: DNS and Global Load Balancing
6 min read DNS and global load balancing are foundational to any internet-scale system. Understanding how DNS resolution works, how GeoDNS routes traffic, Read article
System Design
System Design Interview: Distributed Transactions and Saga Pattern
5 min read Maintaining data consistency across multiple microservices is one of the hardest distributed systems problems. Two-phase commit (2PC) ensures ACID guarantees Read article
Algorithms
Trie and String Algorithm Interview Patterns
8 min read Tries (prefix trees) and string algorithms appear in autocomplete, spell checking, IP routing, and competitive programming. Mastering trie construction and Read article
System Design
System Design Interview: Recommendation Engine at Scale
5 min read Recommendation systems power product discovery at Netflix, Spotify, Amazon, and LinkedIn. Designing one at scale involves a multi-stage architecture that Read article
System Design
System Design Interview: Distributed File System (GFS/HDFS/S3)
5 min read Designing a distributed file system (DFS) like HDFS, Google File System, or Amazon S3 is a classic system design interview Read article
Algorithms
Heap and Priority Queue Interview Patterns
7 min read When to Use a Heap A heap (priority queue) is the right data structure when you need: the minimum or Read article
System Design
System Design Interview: Ride-Sharing Dispatch System (Uber/Lyft)
6 min read Dispatch System Requirements A ride-sharing dispatch system matches riders with nearby available drivers in real time. Core requirements: find available Read article
Algorithms
Dynamic Programming Patterns: Tree DP, Digit DP, and Bitmask DP
12 min read Beyond Basic DP Once you’ve mastered 1D/2D tabulation and memoization (Fibonacci, LCS, Knapsack, Coin Change), advanced interview problems require recognizing Read article
System Design
System Design Interview: WebRTC and Real-Time Video Architecture
12 min read WebRTC Architecture Overview WebRTC (Web Real-Time Communication) is an open standard that enables peer-to-peer audio and video in browsers and Read article
System Design
System Design Interview: Social Graph and Friend Recommendations
13 min read Social Graph Requirements A social graph stores relationships between users (friendships, follows, connections) and enables graph queries: friends of friends, Read article
System Design
System Design Interview: Financial Exchange and Matching Engine
11 min read Exchange Architecture Overview A financial exchange matches buy and sell orders — a buyer willing to pay $100 for AAPL Read article